Please don't think I'm arguing a 'right & wrong' case here, I know I'm in the minority with my Derv preferences!
I'm of the same view, I'm not vehemently against diesels by any stretch, I love the 3.0TDi and bi-turbo diesel engine. I did experiment once (for 4 months) with a diesel in a SEAT FR model but it just didn't resonate with me at all. It wasn't it's ability, it was the way it delivered the experience that wasn't in tune with my personal preference. In comparison I much prefer the 3.0TDi engine, and I did drive one before deciding to go with the S5, but I'd have to be doing stratospheric mileage and be averse to fuel stops to consider it the right option.
Likewise I have an STronic box in the S5 (had no choice), and it's very good, but I'm not 100% sold on that either! It's better at changing gear than I'll ever be, and it makes all sorts of sense for UK road conditions to have one, but I'm not sure I feel passionate about it (yet).
I have a vision of what my preferred driving experience is. It involves a V petrol engine, a manual gearbox, and a decent dollop of rev range. I used to think it would be NA, but I'm not opposed to a bit of subtle forced induction as long as it doesn't overwhelm the whole experience. Unlike many RWD is not my Utopia as I prefer a bit of safety net to compensate my lack of ability so a 60/40 R to F split does nicely. For me that delivers an experience that gives me that momentary warm feeling when it all comes together on the right road that makes the rather large bills seem irrelevant.
However I respect your view, and your preference as there is always more than one way to crack a nut. I keep an open mind, and keep trying the alternatives, but what I really respect about you is you are a diesel owner with a very balanced viewpoint, so kudos to you. The day I have to read another petrol vs, diesel (or manual vs. Stronic) 'which is best' thread I'll quite fancy hanging up my moderator stirrups and make for the hills! The hours I'll never get back!